William



(No Model.)

.W. W. ST. JOHN.

METALLIC PACKING FOR STUFFING BOXES.

PatentedJan. 15, 1889'.-

Fig.5.

- INVEJVTOR, I Wm. J hm,

NITED STATES PATENT FFICE.

METALLIC PACKING FOR STUFFlNG-BOXES.

SPECIFICATION forming part-of Letters Patent N 0. 396,120, dated January 15, 1889.

Application filed September 12, 1887. Serial No. 249,439. (No model.)

.To all whom it may concern.-

Be it known that I, \VILLIAM \Y. ST. JOHN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Metallic Packing for Stuffing-Boxes; and I do hereby declare the following to be afull,clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in metallic stuffing-boxes; and the object of the invention is to produce a stuffing-box which is very simple in its construction, not liable to get out of order, and that can be produced at a very moderate expense; also, to prevent any leakage of steam or other fluid; furthermore, to facilitate the application to old as well as new stuffing-boxes now in use, and, finally, to overcome the dii'iiculties and disadvantages experienced with the stuiting-boxes hitherto employed with metallic as well as flexiple packing by uneven wear or by wearing or burning out altogether, as with the latter.

\Vith these objects in view my invention consists in the construction of certain details and arrangement of parts, as will be more fully described hereinafter, and specifically pointed out in the claims, reference being had to the accompanying drawings and the letters of reference marked thereon.

Like letters indicate similar parts in the difierent figures of the drawings, in which Figure 1 represents a plan view of my improved stut'fing-box for piston-rods, valvestems, &c. Fig. 2 is a section of the same. Figs. 3, 4, 5, and 6 are detail views of the same on an enlarged scale. Fig. 7 is amodification of the same. i

In the drawings, A represents the shell or casing for the metallic sectional packing, which consists, mainly, of the rings a and Z). If desired, one, two, or more of said rings may be employed. The ring a is recessed or oounterbored for the reception of the ring I), which is of rectangular shape. (Best shown in Fig. 4.) The ring a is provided 011 the side toward the steam or other liquid in the cylinder, valve-chest, &c., with a bevel, c, and its inner periphery fits the rod, while the outer periphery loosely fits the interior of the stuffing-box B, or the shell A, in this instance formed of two or more recessed or counterbored rings, 0, D, and E, which can be placed in the stuffing-box with the rings a and b, as shown in Fig. 7, or can be bolted against the cylinder, valve-chest, &c., as shown in Fig. 1. Around the outer periphery of the ring a may be placed a crimped or corrugated ring or band, (I, which serves to press the ring a against the rod until the steam enters into the recess back of said ring. A small space is provided, as at e, for the admission of the steam or fluid from the cylinder, (to. In some instances a small ring, f, split at one side, is employed, by which the bevel side of the ring a is forced against the rod by pressure against the shell-ringA and the bevel part of said ring a. This ring f is, however, not necessary and can be dispensed with, if desired.

The shell, as shown in Fig. 1, is composed of the pieces 0, D, and E, and is recessed for the reception of the rings a, and when employing two of the pieces or rings the upper one is counterbored, as shown at g, for the reception of the upper part of the ring .111, while this ring is made square at its lower corner. A face-ring, O, is placed on the upper side of the packing-rings, and it may be provided with lugs h, as shownin dotted lines in Fig. l, for the bolts-two or more-to fasten the packing to the cylinder, steam-chest, &c.

The packing-rings a and b are made in sections, and the joints of the alternate rings are so arranged as to break joint with each other, so as to prevent any possible. leakage. The rings, as well as the packing-receptacle, may be made of any suitable material and can be made of any size.

If desired, and in case the outer shell of the packing-receptacle is too large for admission into a stuffing-box, it may be placed against the face of said stuffing-box and a plain flange bolted against the end of the shell, by which to secure it to the cylinder, steam-chest, 850., by the ordinary bolts and nuts. The corrugated or crimped ring f serves to hold the sectional rings against the rod when the steam or other pressure is not against them, or in case the engine, pump, &c., is not running. If the stuffing-box is too small for the packing-receptacle, it may be bored out to receive it. The packing also well adapted to rock-drills.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. In stuliing-boxes, the sectional rings a, provided at their contact-surfaces with a bevel side, (3, for forcing it against the rod and a rectangular recess for the ring I) on its outer side, and arranged in a receptacle having rings D B G, into which said rings a and l) fit, all as and for the purpose set forth.

2. A stuifing-box consisting of the rings 0 D E, of the cross-section shown, to receive the 

